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Jawaban:

1. a.) 44cm

b.) 46cm

c.) L= 294cm

K= 102 cm

2. L= 105cm

K= 60cm

Penjelasan dengan langkah-langkah:

1. a.) AE = √13^2 – 12^2

= √ 169 – 144

=√ 25 = 5cm

BF = √ 15^2 – 12^2

= √ 225 – 144

= √ 81 = 9cm

Panjang AB = 30cm + 5cm + 9cm= 44cm

b.) Diagonal AC = √ AB^2 + BC^2

=√ 44^2 + 15^2

= √1.936 + 225

= √ 2.161 = 46cm

c.) Luas = (a+b) x t /2

= (30cm+44cm) x12cm /2

= ( 30cm+44cm) x 6cm /2

=294cm

Keliling= AD+AB+BC+CD

= 13cm+44cm+15cm+30cm = 102cm

2. Tinggi Trapesium = √10^2 – 6^2

= √100 – 36 = √64 = 8cm

Alas sisi miring SP= 24cm- 9cm = 15cm

SP= √15^2 + 8^2

= √225+ 64

= √289 = 17cm

L.Trapesium = (a+b) x t /2

= (9+ 24) x8 /2

= (9+24) x4

=105cm

K.Trapesium= SR+RQ+PQ+SP

=9cm + 10cm + 24cm + 17cm = 60cm